[Docker] sytse/gitlab-data not found

Created by: ghost

Hi,

the offical Docker README.md points to sytse/gitlab-data which can not be found on Docker hub.

Instead it should be:

sytse/gitlab_data

with an underscore. See it on Docker Hub.

With the corrected version a docker pull succeeds:

docker pull sytse/gitlab_data
latest: Pulling from sytse/gitlab_data
cf2616975b4a: Pull complete 
6ce2e90b0bc7: Pull complete 
8c2e06607696: Pull complete 
516ca650d586: Pull complete 
f4c5d5e8c350: Pull complete 
60517059c711: Pull complete 
4a6cc7af9219: Already exists 
Digest: sha256:4dfca72e5dfe97fa83cc71736609c26db91b60d373019ce07542e3e18aec7997
Status: Downloaded newer image for sytse/gitlab_data:latest

Whereas the "old" version:

docker pull sytse:gitlab-data
Pulling repository sytse
FATA[0001] Error: image library/sytse:gitlab-data not found

I'm using Docker in version:

docker --version
Docker version 1.6.1, build 97cd073

Should I create a PR for that?

/cc @dosire